/Engine/Source/Runtime/InteractiveToolsFramework/Public/BaseGizmos/GizmoElementBase.h
Helper method for view alignment. Returns rotation between source and target input coordinate spaces.
FQuat GetAlignRotBetweenCoordSpaces ( FVector SourceForward, FVector SourceRight, FVector SourceUp, FVector TargetForward, FVector TargetRight, FVector TargetUp ) const